After a four-year wait between seasons, the most determined bookworm in anime is back — and she’s not slowing down. WIT Studio’s Ascendance of a Bookworm Season 4: Adopted Daughter of an Archduke returns for its second cour on 11 July 2026, and the freshly released third promotional video confirms the stakes are higher than ever for Rozemyne.
New Themes, New Trailer — What the Cour 2 PV3 Shows
The third PV, released on 27 June on the official production website, previews new scenes of Rozemyne wielding ever-expanding arcanist powers against formidable opponents, alongside both new theme songs for the second half. Kana Nishino — one of Japan’s best-selling solo artists — performs the new opening, Power of Love. Singer adieu (Moka Kamishiraishi) handles the ending song, titled Wanna me.
adieu shared her thoughts on the project, as reported by Anime Corner: “I am truly happy to be able to contribute musically to a series that has been loved for so many years,” adding that working on the anime “taught me that believing in the things you love is also believing in yourself.”
What the Adopted Daughter of an Archduke Arc Is About
If you haven’t caught the series yet, here’s the short version: Ascendance of a Bookworm follows Myne, a book-obsessed woman reincarnated into a fantasy world with no printing press and rampant illiteracy. The early seasons tracked her ingenious (and endlessly resourceful) campaign to bring books to the commoner class. Season 4 vaults her fully into noble archduke territory, adapting Volumes 8–12 of Miya Kazuki’s light novel series (Japanese), now running to over 30 published volumes.
The Adopted Daughter arc places Rozemyne — voiced by Yuka Iguchi — in a world of high-nobility politics, arcanist magic academies, and increasingly complex power plays. Ferdinand (Sho Hayami) returns as her complicated mentor figure, and the Cour 2 trailer hints at confrontations that dwarf anything from the earlier arcs. Director Yoshiaki Iwasaki and series composer Mariko Kunisawa are back at the helm, with WIT Studio continuing their detailed, lush visual style.
When and Where to Watch — Singapore Guide
Crunchyroll holds worldwide streaming rights for Ascendance of a Bookworm Season 4, explicitly covering Singapore. New Cour 2 episodes premiere every Saturday at 4:30pm SGT starting 11 July 2026 — a prime afternoon slot that makes it easy to slot into your weekend watchlist. All 13 Cour 1 episodes are already live on Crunchyroll if you need to catch up. Seasons 1 through 3 are also available there, giving newcomers the full run from the beginning.
For more summer 2026 anime hitting Crunchyroll in Singapore, browse our anime coverage.